private static void chebyshev_even2_test()
//****************************************************************************80
//
// Purpose:
//
// CHEBYSHEV_EVEN2_TEST tests CHEBYSHEV_EVEN2.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 15 January 2016
//
// Author:
//
// John Burkardt
//
{
Console.WriteLine("");
Console.WriteLine("CHEBYSHEV_EVEN2_TEST:");
Console.WriteLine(" CHEBYSHEV_EVEN2 computes the even Chebyshev coefficients");
Console.WriteLine(" of a function F, using the zeros of Tn(x).");
const int n = 6;
double[] b2 = Chebyshev.chebyshev_even2(n, f);
const int s = n / 2;
typeMethods.r8vec_print(s + 1, b2, " Computed Coefficients:");
}
private static void Main()
{
Point p = new Point2D(1, 2);
IVisitor v = new Chebyshev();
p.Accept(v);
Console.WriteLine(p.Metric);
}
public void ZeroSizeListTest()
{
var m = new Chebyshev();
var list = new List <Utility>();
var aVal = m.Calculate(list);
Assert.That(aVal, Is.EqualTo(Zero).Within(Tolerance));
}
private static void Main()
{
Point p = new Point2D(1, 2);
IVisitor v = new Chebyshev();
p.Accept(v);
Console.WriteLine(p.Metric);
}
private static void mltply_test()
//****************************************************************************80
//
// Purpose:
//
// MLTPLY_TEST tests MLTPLY, which multiplies two Chebyshev series.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 24 September 2011
//
// Author:
//
// John Burkardt
//
{
int i;
const int nf = 5;
const int npl = 10;
Console.WriteLine("");
Console.WriteLine("MLTPLY_TEST");
Console.WriteLine(" MLTPLY computes the product of two Chebyshev series.");
Console.WriteLine("");
Console.WriteLine(" Multiply series for SIN(X) and COS(X)");
Console.WriteLine(" and compare with series for 1/2*SIN(2X).");
double[] x = Chebyshev.cheby(nf, npl, functn);
double[] x1 = new double[npl];
double[] x2 = new double[npl];
for (i = 0; i < npl; i++)
{
x1[i] = x[i + 0 * npl];
x2[i] = x[i + 1 * npl];
x[i + 2 * npl] = 0.5 * x[i + 2 * npl];
}
double[] x3 = ChebyshevSeries.mltply_new(x1, x2, npl);
Console.WriteLine("");
Console.WriteLine(" Sin(x) Cos(x) 1/2*Sin(2x) RESULT");
Console.WriteLine("");
for (i = 0; i < npl; i++)
{
Console.WriteLine(" " + x[i + 0 * npl].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + x[i + 1 * npl].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + x[i + 2 * npl].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + x3[i].ToString(CultureInfo.InvariantCulture).PadLeft(14) + "");
}
}
public void ZeroValuesTest()
{
var m = new Chebyshev();
var list = MeasureTestsHelper.RandomUtilityWeightList(_rnd.Next(1, MaxVecLen), 0.0f);
float aVal = m.Calculate(list);
float cVal = MeasureTestsHelper.CalculateChebyshevNorm(list);
Assert.That(aVal, Is.EqualTo(Zero).Within(Tolerance));
Assert.That(cVal, Is.EqualTo(Zero).Within(Tolerance));
}
public void CalculateTest()
{
var m = new Chebyshev();
var list = MeasureTestsHelper.RandomUtilityList(_rnd.Next(1, MaxVecLen));
var aVal = m.Calculate(list);
float cVal = MeasureTestsHelper.CalculateChebyshevNorm(list);
Assert.That(aVal, Is.EqualTo(cVal).Within(Tolerance));
Assert.That(aVal <= One);
Assert.That(aVal >= Zero);
}
private void FindNearestNeighbors(Attributes[] testAttributes, Attributes tuner, int k)
{
foreach (Attributes trainingInstance in testAttributes)
{
if (trainingInstance.xy != tuner.xy)
{
Calculator tCalc = new Calculator(tuner.xy, trainingInstance.xy);
Euclidaen.Add(new KeyValuePair <float, Attributes>(tCalc.getEuclidaen, trainingInstance));
Chebyshev.Add(new KeyValuePair <float, Attributes>(tCalc.getChebyshev, trainingInstance));
Manhattan.Add(new KeyValuePair <float, Attributes>(tCalc.getManhattan, trainingInstance));
}
}
Euclidaen = Euclidaen.OrderBy(o => o.Key).Take(k).ToList();
Chebyshev = Chebyshev.OrderBy(o => o.Key).Take(k).ToList();
Manhattan = Manhattan.OrderBy(o => o.Key).Take(k).ToList();
}
public static void cheby_t_poly_values_test()
//****************************************************************************80
//
// Purpose:
//
// CHEBY_T_POLY_VALUES_TEST tests CHEBY_T_POLY_VALUES.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 02 March 2007
//
// Author:
//
// John Burkardt
//
{
double fx = 0;
int n = 0;
double x = 0;
Console.WriteLine("");
Console.WriteLine("CHEBY_T_POLY_VALUES_TEST:");
Console.WriteLine(" CHEBY_T_POLY_VALUES returns values of");
Console.WriteLine(" the Chebyshev T polynomials.");
Console.WriteLine("");
Console.WriteLine(" N X T(N)(X)");
Console.WriteLine("");
int n_data = 0;
for (;;)
{
Chebyshev.cheby_t_poly_values(ref n_data, ref n, ref x, ref fx);
if (n_data == 0)
{
break;
}
Console.WriteLine(" "
+ n.ToString(CultureInfo.InvariantCulture).PadLeft(6) + " "
+ x.ToString(CultureInfo.InvariantCulture).PadLeft(8) + " "
+ fx.ToString(CultureInfo.InvariantCulture).PadLeft(12) + "");
}
}
private static void cheby_test()
//****************************************************************************80
//
// Purpose:
//
// CHEBY_TEST tests CHEBY, which computes Chebyshev series.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 24 September 2011
//
// Author:
//
// John Burkardt
//
{
int i;
const int nf = 5;
const int npl = 10;
Console.WriteLine("");
Console.WriteLine("CHEBY_TEST");
Console.WriteLine(" CHEBY computes the Chebyshev series for several functions.");
double[] x = Chebyshev.cheby(nf, npl, functn);
Console.WriteLine("");
Console.WriteLine(" Sin(x) Cos(x) Sin(2x) Cos(2x) X^5");
Console.WriteLine("");
for (i = 0; i < npl; i++)
{
string cout = "";
int j;
for (j = 0; j < nf; j++)
{
cout += " " + x[i + j * npl].ToString(CultureInfo.InvariantCulture).PadLeft(14);
}
Console.WriteLine(cout);
}
}
private static void chebyshev_even1_test()
//****************************************************************************80
//
// Purpose:
//
// CHEBYSHEV_EVEN1_TEST tests CHEBYSHEV_EVEN1.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 15 January 2016
//
// Author:
//
// John Burkardt
//
{
double[] a2_exact =
{
0.4477815660,
-0.7056685603,
0.0680357987,
-0.0048097159
}
;
Console.WriteLine("");
Console.WriteLine("CHEBYSHEV_EVEN1_TEST:");
Console.WriteLine(" CHEBYSHEV_EVEN1 computes the even Chebyshev coefficients");
Console.WriteLine(" of a function F, using the extreme points of Tn(x).");
const int n = 6;
double[] a2 = Chebyshev.chebyshev_even1(n, f);
const int s = n / 2;
typeMethods.r8vec2_print(s + 1, a2, a2_exact, " Computed and Exact Coefficients:");
}
private static void test01()
//****************************************************************************80
//
// Purpose:
//
// TEST01 tests CHEBYSHEV_COEFFICIENTS and CHEBYSHEV_INTERPOLANT.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 14 September 2011
//
// Author:
//
// John Burkardt
//
{
int i;
Console.WriteLine("");
Console.WriteLine("CHEBYSHEV_TEST01");
Console.WriteLine(" CHEBYSHEV_COEFFICIENTS computes the coefficients of the");
Console.WriteLine(" Chebyshev interpolant.");
Console.WriteLine(" CHEBYSHEV_INTERPOLANT evaluates the interpolant.");
int n = 5;
double a = -1.0;
double b = +1.0;
double[] c = Chebyshev.chebyshev_coefficients(a, b, n, f1);
double[] x = Chebyshev.chebyshev_zeros(n);
for (i = 0; i < n; i++)
{
x[i] = 0.5 * (a + b) + x[i] * 0.5 * (b - a);
}
int m = n;
double[] fc = Chebyshev.chebyshev_interpolant(a, b, n, c, m, x);
Console.WriteLine("");
Console.WriteLine(" F(X) is a trig function:");
Console.WriteLine("");
Console.WriteLine(" X C(I) F(X) C(F)(X)");
Console.WriteLine("");
for (i = 0; i < n; i++)
{
Console.WriteLine(" " + x[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + c[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + f1(x[i]).ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + fc[i].ToString(CultureInfo.InvariantCulture).PadLeft(14) + "");
}
//
// Try a variant interval.
//
n = 5;
a = 0.0;
b = +3.0;
c = Chebyshev.chebyshev_coefficients(a, b, n, f1);
x = Chebyshev.chebyshev_zeros(n);
for (i = 0; i < n; i++)
{
x[i] = 0.5 * (a + b) + x[i] * 0.5 * (b - a);
}
m = n;
fc = Chebyshev.chebyshev_interpolant(a, b, n, c, m, x);
Console.WriteLine("");
Console.WriteLine(" Consider the same F(X), but now over [0,3]:");
Console.WriteLine("");
Console.WriteLine(" X C(I) F(X) C(F)(X)");
Console.WriteLine("");
for (i = 0; i < n; i++)
{
Console.WriteLine(" " + x[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + c[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + f1(x[i]).ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + fc[i].ToString(CultureInfo.InvariantCulture).PadLeft(14) + "");
}
//
// Try a higher order.
//
n = 10;
a = -1.0;
b = +1.0;
c = Chebyshev.chebyshev_coefficients(a, b, n, f1);
x = Chebyshev.chebyshev_zeros(n);
for (i = 0; i < n; i++)
{
x[i] = 0.5 * (a + b) + x[i] * 0.5 * (b - a);
}
m = n;
fc = Chebyshev.chebyshev_interpolant(a, b, n, c, m, x);
Console.WriteLine("");
Console.WriteLine(" Consider the same F(X), but now with higher order:");
Console.WriteLine("");
Console.WriteLine(" X C(I) F(X) C(F)(X)");
Console.WriteLine("");
for (i = 0; i < n; i++)
{
Console.WriteLine(" " + x[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + c[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + f1(x[i]).ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + fc[i].ToString(CultureInfo.InvariantCulture).PadLeft(14) + "");
}
//
// Try a polynomial.
//
n = 10;
a = -1.0;
b = +1.0;
c = Chebyshev.chebyshev_coefficients(a, b, n, f3);
x = Chebyshev.chebyshev_zeros(n);
for (i = 0; i < n; i++)
{
x[i] = 0.5 * (a + b) + x[i] * 0.5 * (b - a);
}
m = n;
fc = Chebyshev.chebyshev_interpolant(a, b, n, c, m, x);
Console.WriteLine("");
Console.WriteLine(" F(X) is a degree 4 polynomial:");
Console.WriteLine("");
Console.WriteLine(" X C(I) F(X) C(F)(X)");
Console.WriteLine("");
for (i = 0; i < n; i++)
{
Console.WriteLine(" " + x[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + c[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + f3(x[i]).ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + fc[i].ToString(CultureInfo.InvariantCulture).PadLeft(14) + "");
}
//
// Try a function with decaying behavior.
//
n = 10;
a = -1.0;
b = +1.0;
c = Chebyshev.chebyshev_coefficients(a, b, n, f2);
x = Chebyshev.chebyshev_zeros(n);
for (i = 0; i < n; i++)
{
x[i] = 0.5 * (a + b) + x[i] * 0.5 * (b - a);
}
m = n;
fc = Chebyshev.chebyshev_interpolant(a, b, n, c, m, x);
Console.WriteLine("");
Console.WriteLine(" The polynomial approximation to F(X) decays:");
Console.WriteLine("");
Console.WriteLine(" X C(I) F(X) C(F)(X)");
Console.WriteLine("");
for (i = 0; i < n; i++)
{
Console.WriteLine(" " + x[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + c[i].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + f2(x[i]).ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + fc[i].ToString(CultureInfo.InvariantCulture).PadLeft(14) + "");
}
}
public static double[] cardan_poly(int n, double x, double s)
//****************************************************************************80
//
// Purpose:
//
// CARDAN_POLY evaluates the Cardan polynomials.
//
// First terms:
//
// N C(N,S,X)
//
// 0 2
// 1 X
// 2 X^2 - 2 S
// 3 X^3 - 3 S X
// 4 X^4 - 4 S X^2 + 2 S^2
// 5 X^5 - 5 S X^3 + 5 S^2 X
// 6 X^6 - 6 S X^4 + 9 S^2 X^2 - 2 S^3
// 7 X^7 - 7 S X^5 + 14 S^2 X^3 - 7 S^3 X
// 8 X^8 - 8 S X^6 + 20 S^2 X^4 - 16 S^3 X^2 + 2 S^4
// 9 X^9 - 9 S X^7 + 27 S^2 X^5 - 30 S^3 X^3 + 9 S^4 X
// 10 X^10 - 10 S X^8 + 35 S^2 X^6 - 50 S^3 X^4 + 25 S^4 X^2 - 2 S^5
// 11 X^11 - 11 S X^9 + 44 S^2 X^7 - 77 S^3 X^5 + 55 S^4 X^3 - 11 S^5 X
//
// Recursion:
//
// Writing the N-th polynomial in terms of its coefficients:
//
// C(N,S,X) = sum ( 0 <= I <= N ) D(N,I) * S^(N-I)/2 * X^I
//
// then
//
// D(0,0) = 1
//
// D(1,1) = 1
// D(1,0) = 0
//
// D(N,N) = 1
// D(N,K) = D(N-1,K-1) - D(N-2,K)
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 28 March 2012
//
// Author:
//
// John Burkardt
//
// Reference:
//
// Thomas Osler,
// Cardan Polynomials and the Reduction of Radicals,
// Mathematics Magazine,
// Volume 74, Number 1, February 2001, pages 26-32.
//
// Parameters:
//
// Input, int N, the highest polynomial to compute.
//
// Input, double X, the point at which the polynomials are to be computed.
//
// Input, double S, the value of the parameter, which must be positive.
//
// Output, double CARDAN_POLY[N+1], the values of the Cardan polynomials at X.
//
{
int i;
double[] x2 = new double[1];
double s2 = Math.Sqrt(s);
x2[0] = 0.5 * x / s2;
double[] v = Chebyshev.cheby_t_poly(1, n, x2);
double fact = 1.0;
for (i = 0; i <= n; i++)
{
v[i] = 2.0 * fact * v[i];
fact *= s2;
}
return(v);
}
private static void dfrnt_test()
//****************************************************************************80
//
// Purpose:
//
// DFRNT_TEST tests DFRNT, which computes the Chebyshev series of a derivative.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 24 September 2011
//
// Author:
//
// John Burkardt
//
{
int i;
int j;
const int nf = 5;
const int npl = 10;
Console.WriteLine("");
Console.WriteLine("DFRNT_TEST");
Console.WriteLine(" DFRNT computes the Chebyshev series for the derivative");
Console.WriteLine(" of several functions.");
double[] x = Chebyshev.cheby(nf, npl, functn);
double[] x2 = new double[npl];
for (j = 0; j < nf; j++)
{
for (i = 0; i < npl; i++)
{
x2[i] = x[i + j * npl];
}
double[] x3 = ChebyshevSeries.dfrnt(x2, npl);
for (i = 0; i < npl; i++)
{
x[i + j * npl] = x3[i];
}
}
Console.WriteLine("");
Console.WriteLine(" Chebyshev series for d/dx of:");
Console.WriteLine("");
Console.WriteLine(" Sin(x) Cos(x) Sin(2x) Cos(2x) X^5");
Console.WriteLine("");
for (i = 0; i < npl; i++)
{
string cout = "";
for (j = 0; j < nf; j++)
{
cout += " " + x[i + j * npl].ToString(CultureInfo.InvariantCulture).PadLeft(14);
}
Console.WriteLine(cout);
}
}
public static BasisFunctionBase BasisFunctionSelector(BasisFunctionsEnum functionChoise)
{
//default
BasisFunctionBase solver = null;
switch (functionChoise)
{
case BasisFunctionsEnum.AsymmetricGaussian:
solver = new AsymmetricGaussian();
solver.Coefficients = new double[4];
solver.Coefficients[0] = .5;
solver.Coefficients[1] = .5;
solver.Coefficients[2] = .3;
solver.Coefficients[3] = 1;
break;
case BasisFunctionsEnum.Linear:
solver = new Linear();
solver.Coefficients = new double[2];
solver.Coefficients[0] = 1; // m
solver.Coefficients[1] = 0; // b
break;
case BasisFunctionsEnum.PolynomialQuadratic:
{
solver = new Quadratic();
solver.Coefficients = new double[3];
solver.Coefficients[0] = 1; //ax^2
solver.Coefficients[1] = 1; //bx
solver.Coefficients[2] = 1; //c
}
break;
case BasisFunctionsEnum.PolynomialCubic:
{
solver = new Cubic();
solver.Coefficients = new double[7];
solver.Coefficients[0] = 1; //ax^3
solver.Coefficients[1] = 1; //bx^2
solver.Coefficients[2] = 1; //cx
solver.Coefficients[3] = 1; //d
solver.Coefficients[4] = 1; //d
solver.Coefficients[5] = 1; //d
solver.Coefficients[6] = 1; //d
}
break;
case BasisFunctionsEnum.Lorentzian:
{
solver = new Lorentian();
solver.Coefficients = new double[3];
solver.Coefficients[0] = 6; //width
solver.Coefficients[1] = 50; //height
solver.Coefficients[2] = -1; //xoffset
}
break;
case BasisFunctionsEnum.Gaussian:
{
solver = new Gaussian();
solver.Coefficients = new double[3];
solver.Coefficients[0] = 6; //sigma
solver.Coefficients[1] = 50; //height
solver.Coefficients[2] = -1; //xoffset
}
break;
case BasisFunctionsEnum.Chebyshev:
{
solver = new Chebyshev();
solver.Coefficients = new double[6];
solver.Coefficients[0] = 0; //?
solver.Coefficients[1] = 1; //?
solver.Coefficients[2] = 1; //?
solver.Coefficients[3] = 0; //?
solver.Coefficients[4] = 0; //?
solver.Coefficients[5] = 0; //?
}
break;
case BasisFunctionsEnum.Orbitrap:
{
solver = new OrbitrapFunction();
solver.Coefficients = new double[3];
solver.Coefficients[0] = 1; //?
solver.Coefficients[1] = 1; //?
solver.Coefficients[2] = 1; //?
//quadSolver.Coefficients[3] = 1;//?
//quadSolver.Coefficients[4] = 1;//?
//quadSolver.Coefficients[4] = 1;//?
}
break;
case BasisFunctionsEnum.Hanning:
{
solver = new Hanning();
solver.Coefficients = new double[3];
solver.Coefficients[0] = 1; //?
solver.Coefficients[1] = 1; //?
solver.Coefficients[2] = 1; //?
}
break;
}
return(solver);
}
public void ConstructorTest()
{
var m = new Chebyshev();
Assert.IsNotNull(m);
}
private static void edcheb_test()
//****************************************************************************80
//
// Purpose:
//
// EDCHEB_TEST tests EDCHEB, which evaluates the derivative of a Chebyshev series.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 24 September 2011
//
// Author:
//
// John Burkardt
//
{
int j;
const int nf = 5;
const int npl = 10;
const int nx = 6;
Console.WriteLine("");
Console.WriteLine("EDCHEB_TEST");
Console.WriteLine(" EDCHEB evaluates the derivative of a Chebyshev series.");
double[] x = Chebyshev.cheby(nf, npl, functn);
double[] x2 = new double[npl];
for (j = 0; j < nf; j++)
{
int i;
for (i = 0; i < npl; i++)
{
x2[i] = x[i + j * npl];
}
Console.WriteLine("");
switch (j)
{
case 0:
Console.WriteLine(" Sin(x)");
break;
case 1:
Console.WriteLine(" Cos(x)");
break;
case 2:
Console.WriteLine(" Sin(2x)");
break;
case 3:
Console.WriteLine(" Cos(2x)");
break;
case 4:
Console.WriteLine(" x^5");
break;
}
Console.WriteLine("");
int k;
for (k = 0; k < nx; k++)
{
double xval = 2.0 * k / (nx - 1) - 1.0;
double[] fxj = functn_d(xval);
double fval = ChebyshevSeries.edcheb(xval, x2, npl);
Console.WriteLine(" " + xval.ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + fxj[j].ToString(CultureInfo.InvariantCulture).PadLeft(14)
+ " " + fval.ToString(CultureInfo.InvariantCulture).PadLeft(14) + "");
}
}
}